Description Preview
A vulnerability exists in the logging API of Cisco Firepower Management Center (FMC) Software that lacks proper rate-limiting mechanisms. This vulnerability (CVE-2023-20155) allows unauthenticated remote attackers to send a high volume of HTTP requests to a specific API related to FMC logs, causing the device to become unresponsive with CPU usage spiking to 100% or triggering an unexpected system reload. Additionally, authenticated users without Administrator privileges could potentially view system log files they should not have access to. The CPU utilization would return to normal if the attack traffic is stopped before a device reload occurs.
Overview
This vulnerability (CWE-400: Uncontrolled Resource Consumption) affects the Cisco Firepower Management Center Software's logging API. The issue stems from insufficient rate-limiting on requests to a specific API endpoint related to FMC logs. Attackers can exploit this by flooding the API with HTTP requests, causing two potential impacts: (1) a denial of service condition where CPU usage reaches 100%, making the system unresponsive, or (2) an unexpected device reload. Additionally, users with valid credentials but without Administrator privileges may gain unauthorized access to system log files. This vulnerability poses a significant risk to the availability of affected FMC systems and potentially compromises the confidentiality of log information.
Remediation
- Update to the latest version of Cisco Firepower Management Center Software that contains fixes for this vulnerability.
- Implement network-level access controls to restrict access to the FMC management interface to trusted IP addresses only.
- Monitor system logs for unusual spikes in API requests that could indicate exploitation attempts.
- Consider implementing additional rate-limiting at the network level if possible.
- Follow Cisco's security best practices for FMC deployment and management.
- Regularly review user access privileges to ensure the principle of least privilege is maintained.
References
- Cisco Security Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-logview-dos-AYJdeX55
- Common Weakness Enumeration: CWE-400 (Uncontrolled Resource Consumption)
- MITRE CVE Entry: CVE-2023-20155
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
